Title :
Design of dc link current observer for a 3-phase active rectifier with feedforward control
Author :
Zhou, Zhongfu ; Liu, Yanzhen ; Unsworth, P.J.
Author_Institution :
Dept. of Eng. & Design, Sussex Univ., Brighton, UK
Abstract :
This paper describes a high performance current controlled three-phase unity power factor active rectifier. A second order current observer measures the dc link current drawn, which is then fed forward to a current regulator. A fast feedforward control scheme has been implemented without requiring actual dc link current sensors or communication channels, and is a control solution for common dc bus systems with multiple inverter driven loads. In addition, a novel method to estimate the value of the dc link capacitance is described in this paper. Both simulation and experiment have been conducted to investigate the performance of the active rectifier control, and excellent results show the validity of the proposed control model.
Keywords :
electric current control; electric current measurement; feedforward; invertors; power factor; rectifying circuits; 3-phase active rectifier; active rectifier control; current controlled three-phase unity power factor; dc bus systems; dc link current measurement observer; feedforward control; multiple inverter driven loads; second order current observer; Capacitance; Communication channels; Communication system control; Control systems; Current measurement; Inverters; Reactive power; Rectifiers; Regulators; Sensor systems;
Conference_Titel :
Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE
Print_ISBN :
0-7803-8486-5
DOI :
10.1109/IAS.2004.1348447
